Merge pull request #5 from jefflinwood/master

Update Twilio Client for PhoneGap for iOS to 2.9 compatibility
Updated plugin for use with Cordova 2.9. Added two functions to manage displaying a UILocalNotification to the user in the event of an incoming call while the app is in a backgrounded state.
Added helper method to turn speaker phone on or off. Fixed bug with sendDigits.
Added documentation of new setSpeaker method.
Removed commented code. Removed sound exists check.
Removed unneeded comment.
Fixed merge conflicts.
Altered how showNotification works in Android plugin. Added setSpeaker() method to Android plugin. Added reject() method to Android plugin. Misc bug fixes.
Fixed issue with intent messing with back button in Android. Changed the notification to use your app's notification.png file.
Merge pull request #1 from lylepratt/master

Merge changes from Lyle's repository back into mine